/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
   
/**
 * @filename: function/math/ord.cc
 */ 
#include <server_includes.h>
#include CSTDINT_H
#include <function/math/ord.h>

int64_t Item_func_ord::val_int()
{
  assert(fixed == 1);
  String *res=args[0]->val_str(&value);
  if (!res)
  {
    null_value=1;
    return 0;
  }
  null_value=0;
  if (!res->length()) return 0;
#ifdef USE_MB
  if (use_mb(res->charset()))
  {
    register const char *str=res->ptr();
    register uint32_t n=0, l=my_ismbchar(res->charset(),str,str+res->length());
    if (!l)
      return (int64_t)((unsigned char) *str);
    while (l--)
      n=(n<<8)|(uint32_t)((unsigned char) *str++);
    return (int64_t) n;
  }
#endif
  return (int64_t) ((unsigned char) (*res)[0]);
}

